Hey,

on the first run of the day after warming up the turbo will spike past ( .5 - 1psi ) the electronic boost controller limit
but after that once they system is hot it wont to make over 11 psi if i crack the controller up to 14psi or so.

It is a stok S5 turbo with ported wastegate.

My engine is street ported tho.

 

That dosnt surprise me. A motor will flow a lot more at 10-11 psi with a street port than with stock ports. Honestly that sounds pretty good for a stock turbo.

 

sounds familiar, my car the boost drops off in the top end, i cant hold 10psi to redline. but my motor is a jspec so who knows whats done to it, and im on my like 4th or 5th turbo now...

 

ok sweet then so i may as well bin that stock turbo with the new extended port motor going in this weekend haha.

 

i WISH i had this problem. expect its vise-versa for me. Jspec S5 streetported engine with S4 turbo + ported wastegate. holds boost at around 11-13. boost creep takes over from there and i have to feather the gas to keep it from destryoing my turbo..

 

well clearly your wastegate isnt ported enough haha.

 

I thought I heard the stock turbo isn't very reliable past 12 psi? Or at least the stock IC isn't, I very well could be wrong about the stock turbo.

 

[QUOTE]I thought I heard the stock turbo isn't very reliable past 12 psi? Or at least the stock IC isn't, I very well could be wrong about the stock turbo.[/QUOTE

Its not so much reliability as it is efficiency. The stock intercooler is crap above 10 psi, and the stock turbo is innefficient above 12 psi. Basically your just pumping hot air into your engine, which makes blowing it a hell of alot easier.

 

god dam......the stock turbo only puts out what, like 3 psi stock???? putting it up to 14......thats hella pushing it YOU might have fcked up ur turbo....

 

S4 turbo's are around 5.5psi stock. S5's are around 7psi.

 

It's reliability too. Past 11-12psi you're overspeeding the turbo and dramatically shortening bearing life.

That's at redline. Peak stock boost is 6.6psi and 8.3psi respectively.

 

Most people don't need to know that.

 

I do

 

Why would someone not want to know? Maybe you're happy with only half the info, but others might have higher expectations...

 

Telling people they can make higher boost above redline isn't exactly information I would divulge on a forum populated with the mechanically inept. That's all I was saying.

 

Above redline? WTF? I never said anything like that. Peak boost in stock form occurs around 3000-4000rpm, and then it starts to drop.

 

Haha I totally misunderstood what you said. Disregard.